Brake-shoe.



J. D. GALLAGHER.

BRAKE SHOE.

APPLICATION FILED DEC. 18, 1914.

1,175,255. 5 Patented Mar. 14-, 1916.

i J i": :11 if mmvrok UNITED STATES PATENT OFFICE.

JOSEPH D. GALLAGHER, OF GLEN RIDGE, NEW

JERSEY, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH,NEW JERSEY, A CORPORATION OF NEW JERSEY.

BRAKE-SHOE.

Application filed December 18, 1914. Serial No.

To all whom it may concern.-

Be it known that I, JosnPH D. GALLA- GHER, a citizen of the UnitedStates, and a resident of Glen Ridge, in the county of Essex and Stateof New Jersey, have made and invented certain new and usefulImprovements in Brake-Shoes, of which the following is a specification.

My invention relates to an improvement in brake shoes, and moreparticularly to an improvement upon the shoe shown and described in anapplication filed by me on the 2nd day of May, 1913, and bearing SerialNumber 765,010 and ,issuing as Patent Number 1,122,583. i v

In the above-mentioned application, I have described that ordinarily thebody of a brake shoe contains such a quantity of metal that when appliedto the tread of the wheel it is Warped or twisted, due to the heatgenerated by friction, the body of the shoe straightening out and thusresulting in 1mperfect contact between the shoe and the tread of thewheel. When the shoe is subse uently cooled it may assume a slightlydiflerent curvature to that which it originally had, and whensubsequently applied to the tread of the wheel the ends or toes only ofthe shoe will come into contact with the tread of the wheel, thisdistortion resulting in constantly shifting the wearing portions orareas of the shoe. In .order to overcome this defect, I have providedthe shoe with slots or recesses on opposite sides of the transversecenter of the body, these recesses extending substantially to the back.of the shoe and dividing the body into segments. I have found, however,that in the handling of this slotted or segmental shoe, that is, in theloading and unloading of the same into and from freight cars, and alsoduring transportation, and also while the castings are being finished inthe tumbling barrel, there is always more or less danger of injuringtheshoe by cracking the metal adjacent to the reinforcing back, this beingdue to the fact that the slotting of the shoe partway through the body,and to points in proximity to the reinforcing back or plate, weakens theshoe.

The object of my present invention is to so construct the shoe thatwhile the feature of slotting or recessi'ng the body may be retained,yet at the same time to obviate all danger of breaking or cracking themetal Specification of Letters Patent.

' and with the Patented Mar. 14, 1916. 877,853.

between the end of the slot and the reinforcing back, and with this andother ends in vlew, the invention consists in certain novel features ofconstruction as will be hereinafter fully described and pointed out inthe claims.

In the accompanying drawing, Figure 1 1s a view in side elevation of abrake shoe constructed in accordance with my invention. Fig. 2 is atopplan view thereof. Fig. 3 is-a sectional view taken on the line 3 3 ofFig. 1.

Referring to the drawings, 5 represents the body of the shoe, and madeof any desired metal, such, for instance, as gray iron, the back of theshoe being provided with a reinforcing plate 6, this plate beingprovided with holes or openings 7 through which the body metal isallowed to flow in order to securely anchor the parts together. The shoeis further formed with an attaching lug 8 of any desired construction ortype, guide lugs 9 and end stops 10, as is usual in structures of thiskind. By reference to Figs. 1 and 3 of the drawing, it will be seen thatthe reinforcing plate 6 has its sides turned or bent downwardly to formflanges 11, the width or depth of the flange being such as to extendsubstantially to the upper ends of the slots or recesses 12 formed inthe body of the shoe, and dividing the latter into sections or segments.

By thus forming the shoe it will be understood that an added stiflnessor rigidity is given to the plate and to the back or rear portion of theshoe, largely overcoming any danger of the shoe being straightened out,as.above,described, and avoiding the danger of cracking the metal of thebody between the upper end of the slot and the back or rear surface ofthe shoe. Furthermore, thisavoids the necessity of bridging the slots orrecesses 12, either by the cast metal of the body of the shoe, or byseparate pieces or inserts molded into the shoe, the reinforcing plate6, with its depending side flanges, together with the metal or stockcomprising the back of the shoe, effectually preventing any distortionof the shoe either during the handling of the same or while in service.

It will of course be understood without further description orillustration that the ribs or flanges on the reinforcing back may belocated at other places than on the edges of the plate, it beingessential only that they extend lengthwise or longitudinally of theplate, and of suflicient depth or width to impart to the structure thenecessary strength to overcome any stress or strain which might beexerted or imposedupon the body of the shoe to result in straighteningthe same out and cracking the metal at the upper ends of the slots orrecesses.

What I claim is 1. A brake shoe comprising a body provided with aplurality of recesses extending from the wearing face thereof toward theback, a reinforcing plate anchored to the back of the shoe and havingits edges bent downwardly to form flanges and extending approximatelyvto the outer ends of said recesses. Y

2. A brake shoe comprising a body having a recess extending from thewearing face thereof toward the back, and a reinforcing back plateanchored to the back of the body of the shoe and having its edges bentover to form flanges, said flanges embracing and reinforcing the body ofthe shoe between the outer ends of said recesses and the rear surfacethereof and. holding the back against JOSEPH D. GALLAGHER.

Witnesses; I

ANNA V. VVALsH, Greener E. COOK.

